Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Schematic diagram of OR-PAM system with a three-wavelength pulsed laser. BS: beam splitter R/T: 90/10, DM1&DM2: dichroic mirror 550 nm short-pass, HWP1-3: half-wave plate, LPF: 540 nm long-pass filter, PBS: polarization beam splitter, SM fiber 1-2: single-mode fiber, UST: ultrasonic transducer, VNDF: variable neutral density filter.
